Re: how to take Multiple Lpi job from Agfa Apogee PDFRip?
I used to use the Apogee series 3 RIP, and discovered that we had it set to honor the screen settings in the PDF files when a job ran through that had screen settings encoded in the PDF. We did (and do still) use DQS, and each page was rendered with the same lpi, but different pages on the same flat had different frequencies. After testing, I concluded that there could be only one screen ruling per page. I'm guessing that everytime a screen ruling is encountered, it overwrites the setting for the entire page (flat in your case), resulting in the screen ruling of the last object in the data stream that has the lpi attribute. With DQS, each page is processed independently, and then the flat images are processed (crop marks, color bars, etc.). Without DQS, I would bet that each flat must use the same ruling, because the entire flat is processed as one unit.
The following is based upon my experience with Printdrive series 3, and may not be possible with series 2, and may depend upon licensed options that you do not have. It does +not+ require DQS:
Process a separate job for each frequency. For example, if all images should be rendered with 150 or 175 lpi, process a job that has only the 150 lpi objects at 150 lpi, then process a job that has only the 175 lpi objects. When the two jobs are in Printdrive, click and hold on one job in the job list, drag it onto the other, and choose "move here." The two jobs will be merged together. In the properties/content window, for each flat, double-click on redundant colors (there should be two of each ink listed), and change the image type to "QuickFix/Doubleburn flat." The inks will now be merged when the job is plated. You don't have to worry about common elements (such as color bars) darkening because of overprinting the redundant colors, because they are already screened when merged, and each pixel is either 0% or 100%.
Please post back and let me know wether or not this works, or if you find a better solution.